for Microplates Well Positions

Transcription

1 ANSI SLAS (R202) (formerly recognized as ANSI/SBS ) for Microplates Well Positions Secretariat Society for Laboratory Automation and Screening 0/3/20

2 Contents Page Foreword... 3 Scope and purpose Scope Purpose Normative references Definitions Well positions well microplate well microplate well microplate... 6 Figure... 8 Figure - Well positions of a 96 well microplate... 8 Figure 2- Well positions of a 384 well microplate... 9 Figure 3- Well positions of a 536 well microplate... 0 Annex... Annex A (Informative) Interpretation of Figures... 0/3/20 2

3 Foreword As early as the first meeting of the Society for Biomolecular Screening (SBS) in 995, a need for clearly defined dimensional standards of a microplate was identified. At the time, the microplate was already becoming an essential tool used in drug discovery research. At the time, the concept of a microplate was similar among various manufacturers, but the dimensions of microplates produced by different vendors, and even within a single vendors catalog line varied. This often caused numerous problems when microplates were to be used in automated laboratory instrumentation. In late 995, members of the SBS began working on defining dimensional standards for the standard 96 well microplate. The first written proposal was released in December 995 and presented at numerous scientific conferences and journals throughout 996. This initial proposed standard was officially presented to the membership of SBS for approval at the annual meeting in October 996 in Basel, Switzerland. Between then and late 998, various versions of the proposed standards for 96 and 384 well microplates were circulated to the membership of the society. In early 999, efforts to begin formalizing the proposed standards in preparation for submission to a recognized standards organization were begun. The ListServ was started in March, and the first regular quarterly meeting of the working committee met in August of that year. To date, the ListServ contains members representing over 00 corporations, educational institutions, and government organizations from over 5 nations. There is one annex in this standard. Annex A is informative and not considered part of this standard. It is provided as an aid only for the interpretation of specific elements of ASME Y4.5 as they apply to figures in SBS standards. In July of 200, SBS merged with The Association for Laboratory Automation (ALA) to form The Society for Laboratory Automation and Screening (SLAS). Suggestions for improvement of this standard will be welcome. They should be sent to the Microplate Standards Development Committee of the Society for Laboratory Automation and Screening, 00 Illinois Street, Ste 242, St. Charles, Illinois This standard was processed and approved for submittal to ANSI by the Microplate Standards Development Committee of the Society for Biomolecular Screening (now known as the Society of Laboratory Automation and Screening). Committee approval of this standard does not necessarily imply that all committee members voted for its approval. At the time it approved this standard, the committee had the following member organizations: Marc Feiglin, Co-chair Carol Homon, Co-chair Organization Represented Apogent Discoveries,2 MatriCal BD Biosciences Merck & Co 3 Beckman Coulter,2 Millipore Boehringer-Ingelheim 3 MJ Research,2 Co Bio Engineering 3 Molecular Devices,2 Corning REMP 2 Greiner BioOne Tecan 2 Hamilton Co 2 Thermo Electron 2 Hoffman La Roche 3 Whatman Interest groups. Manufacturers of microplates (n=0) 2. Manufacturers of instrumentation that utilizes microplates (n=8) 3. Users of microplates that do not fit in either of the previous categories (n=4) 0/3/20 3

4 Scope and purpose. Scope This standard defines the well center positional requirements of a microplate as specified in American National Standards covering these microplates..2 Purpose It is the purpose of this standard to describe the minimal dimensions required of a microplate that is considered to meet the standards. This standard also outlines the conditions required for making necessary measurements. Unless otherwise specified, all dimensions are applicable at 20 degrees C (68 degrees F). Compensation may be made for measurements made at other temperatures. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this American National Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. ASME Y4.5M-994, Dimensioning and Tolerancing 3 Definitions There are many terms and definitions associated with microplates that have special meaning to the industry. The following are definitions of terms used in this document: 3. ASME: Abbreviation for the American Society of Mechanical Engineers 3.2 ANSI: Abbreviation for the American National Standards Institute, Inc. 3.3 SBS: Abbreviation for the Society for Biomolecular Screening. 3.4 SLAS: Abbreviation for the Society for Laboratory Automation and Screening. 4 Well positions Microplates that meet this standard may either comply with those standards specified in parts 4., 4.2, or 4.3. Microplates, or instruments that use them, that advertise compliance with this standard must clearly state which of these three parts they meet well microplate 4.. Well layout 4... The wells in a 96 well microplate should be arranged as eight rows by twelve columns Well column position The distance between the left outside edge of the plate and the center of the first column of wells shall be 4.38 mm (0.566 inches) The left edge of the part will be defined as the two 2.7 mm areas (as measured from the corners) as specified in SBS Each following column shall be an additional 9. mm ( inches) in distance from the left outside edge of the plate Well row position 0/3/20 4

5 4..3. The distance between the top outside edge of the plate and the center of the first row of wells shall be.24 mm ( inches) The top edge of the part will be defined as the two 2.7 mm areas (as measured from the corners) as specified in SLAS- (formerly SBS-) Each following row shall be an additional 9. mm ( inches) in distance from the top outside edge of the plate Positional Tolerance The positional tolerance of the well centers will be specified using so called True Position. The center of each well will be within a 0.70 mm ( inches) diameter of the specified location. This tolerance will apply at RFS (regardless of feature size) Well Markings The top left well of the plate shall be marked in a distinguishing manner. Such distinguishing marks include, but are not limited to the following: x The top left well of the plate can be marked with the letter A or numeral located on the left-hand side of the well. x The top left well of the plate can be marked with a numeral located on the upper side of the well Additional markings may be provided well microplate 4.2. Well layout The wells in a 384 well microplate should be arranged as sixteen rows by twenty-four columns Well column position The distance between the left outside edge of the plate and the center of the first column of wells shall be 2.3 mm ( inches) The left edge of the part will be defined as the two 2.7 mm areas (as measured from the corners) as specified in SLAS- (formerly SBS-) Each following column shall be an additional 4.5 mm (0.772 inches) in distance from the left outside edge of the plate Well row position The distance between the top outside edge of the plate and the center of the first row of wells shall be 8.99 mm ( inches) The top edge of the part will be defined as the two 2.7 mm areas (as measured from the corners) as specified in SLAS- (formerly SBS-) Each following row shall be an additional 4.5 mm (0.772 inches) in distance from the top outside edge of the plate Positional Tolerance 0/3/20 5

6 The positional tolerance of the well centers will be specified using so called True Position. The center of each well will be within a 0.70 mm ( inches) diameter of the specified location. This tolerance will apply at RFS (regardless of feature size) Well Markings The top left well of the plate shall be marked in a distinguishing manner. Such distinguishing marks include, but are not limited to the following: x The top left well of the plate can be marked with the letter A or numeral located on the left-hand side of the well. x The top left well of the plate can be marked with a numeral located on the upper side of the well Additional markings may be provided well microplate 4.3. Well layout The wells in a 536 well microplate should be arranged as thirty-two rows by forty-eight columns Well column position The distance between the left outside edge of the plate and the center of the first column of wells shall be.005 mm ( inches) The left edge of the part will be defined as the two 2.7 mm areas (as measured from the corners) as specified in SLAS- (formerly SBS-) Each following column shall be an additional 2.25 mm ( inches) in distance from the left outside edge of the plate Well row position The distance between the top outside edge of the plate and the center of the first row of wells shall be mm ( inches) The top edge of the part will be defined as the two 2.7 mm areas (as measured from the corners) as specified in SLAS- (formerly SBS-) Each following row shall be an additional 2.25 mm ( inches) in distance from the top outside edge of the plate Positional Tolerance The positional tolerance of the well centers will be specified using so called True Position. The center of each well will be within a 0.50 mm (0.097 inches) diameter of the specified location. This tolerance will apply at RFS (regardless of feature size) Well Markings The top left well of the plate shall be marked in a distinguishing manner. Such distinguishing marks include, but are not limited to the following: x The top left well of the plate can be marked with the letter A or numeral located on the left-hand side of the well. x The top left well of the plate can be marked with a numeral located on the upper side of the well. 0/3/20 6

7 Additional markings may be provided. 0/3/20 7

8 Figure NOTES: The drawing standard used is ASME Y4.5M The geometry shown is for illustration only and does not imply any preferred or required construction. 3 Dimensions shown are: Millimeters / (Inches) 4 Dimensions and tolerances do not include draft. A The top left well of the plate shall be clearly marked (e.g.: on the left with the letter A or the numeral, or at the top with the numeral ). Additional markings may be provided. Figure - Well positions of a 96 well microplate 0/3/20 8

9 NOTES: The drawing standard used is ASME Y4.5M The geometry shown is for illustration only and does not imply any preferred or required construction. 3 Dimensions shown are: Millimeters / (Inches) 4 Dimensions and tolerances do not include draft. A The top left well of the plate shall be clearly marked (e.g.: on the left with the letter A or the numeral, or at the top with the numeral ). Additional markings may be provided. Figure 2- Well positions of a 384 well microplate 0/3/20 9

10 NOTES: The drawing standard used is ASME Y4.5M The geometry shown is for illustration only and does not imply any preferred or required construction. 3 Dimensions shown are: Millimeters / (Inches) 4 Dimensions and tolerances do not include draft. A The top left well of the plate shall be clearly marked (e.g.: on the left with the letter A or the numeral, or at the top with the numeral ). Additional markings may be provided. Figure 3- Well positions of a 536 well microplate 0/3/20 0

11 Annex Annex A (Informative) Interpretation of Figures Annex A is a general guide to interpreting figures in SLAS (formerly SBS) standards in accordance with ASME Y4.5M Annex A is not intended to be a substitute for a working knowledge of dimensioning and tolerancing practices contained therein. The specific examples in Annex A are not comprehensive and may or may not apply to the figures in this particular SBS standard. A. Specifying datum A.2 Specifying composite datum 0/3/20

12 A.3 Application of composite datum A.4 Parallelism 0/3/20 2

13 A.5 Tolerances over a limited area A.6 True position vs ± tolerance 0/3/20 3